Henry Loyn studied at the University College of Cardiff, where he became Professor of Medieval History. He then taught at Westfield college, at the University of London, where he is now Emeritus Professor. He was formerly President of the Historical Association, and is a Fellow of the British Academy.

Historical Association Studies are incisive essays on major historical topics. Intended primarily for students, book in the series provide critical interpretations of research in some of the central themes and key episodes of history.